Which of the following is not an antitussive drug?
a. ammonium chloride c. benzonatate
b. hydrocodone bitartrate d. dextromethorphan HBr
ANS: A
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A Correct: Ammonium chloride is not an antitussive.
B Incorrect: This is an antitussive.
C Incorrect: This is an antitussive.
D Incorrect: This is an antitussive.
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